Silver Bromide AgBr

♦ Silver Bromide (AgBr) SDS

♦ Silver Bromide (AgBr) Data Sheet

Silver Bromide is useful material for very deep IR applications where sensitivity to moisture is a problem. Silver Bromide crystal growth was developed relatively recently by the standards of many IR materials. The parameters of Silver Bromide have not been researched as thoroughly as those of Silver Chloride. This soft crystal deforms under heat and pressure and can be forged in polished dies to create IR windows and lenses.

Transmission Range

0.5 to 35 μm (1)

Refractive Index

2.167 at 10 μm (1) (2)

Reflection Loss

23.9% at 10 μm (2 surfaces)

Absorption Coefficient

n/a

Reststrahlen Peak

112.7 μm

dn/dT

n/a

dn/dμ = 0

n/a

Density

6.473 g/cc

Melting Point

432°C

Thermal Conductivity

1.21 W m-1 K-1 @ 273 K

Thermal Expansion

30 x 10-6/°C @ 273 K

Hardness

Knoop 7

Specific Heat Capacity

292 J Kg-1 K-1

Dielectric Constant

13.1 at 1 MHz (2)

Youngs Modulus (E)

31.97 GPa

Shear Modulus (G)

n/a

Bulk Modulus (K)

44.03 GPa

Elastic Coefficients

C11 = 56.3 C12 = 32.3 C44 = 7.25

Apparent Elastic Limit

30.3 MPa (4400psi)

Poisson Ratio

n/a

Solubility

12 x 10-6g/100g water at 20°C

Molecular Weight

187.78

Class/Structure

Cubic FCC, NaCl, Fm3m, No cleavage, cold flows

µm	No
0.391	2.416
0.477	2.33
0.496	2.313
0.55	2.27

µm	No
0.60	2.25
0.65	2.24
0.781	2.205

µm	No
9.926	2.167
12.66	2.162

Silver Bromide is grown in small ingots by sealed ampoule Stockbarger techniques. Silver Bromide is malleable and deep yellow, it darkens in sunlight, but less readiliy than Silver Chloride.

(1) Handbook of Optical Constants, ed Palik, V3, ISBN 0-12-544423-0
(2) White; Optical Properties of Silver Bromide. J.Opt.Soc. Am. V62, N2 (1973)

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Silver Bromide AgBr

♦ Silver Bromide (AgBr) SDS

♦ Silver Bromide (AgBr) Data Sheet

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